Swimming at the 2005 World Aquatics Championships – Men's 4 × 100 metre medley relay
# Swimming at the 2005 World Aquatics Championships – Men's 4 × 100 metre medley relay

The Men's 4x100 Medley Relay event at the 11th FINA World Aquatics Championships was swum on July 31, 2005 in Montreal, Quebec, Canada. 21 national teams swam in the Preliminary heats of the event in the morning; with the top-8 fastest teams advancing to swim again in the Final that evening.

At the start of the event, the existing World (WR) and Championships (CR) records were:

* WR: 3:30.68, USA, swum August 21, 2004 in Athens, Greece
* CR: 3:31.54, USA, swum July 27, 2003 in Barcelona, Spain

## Results

### Final

| Place | Lane | Nation | Swimmers (split) | Time |
| - | - | - | - | - |
| 1 | 4 | USA | Aaron Peirsol (54.26), Brendan Hansen (59.33), Ian Crocker (50.39), Jason Lezak (47.87) | 3:31.85 |
| 2 | 3 | Russia | Arkady Vyatchanin (54.75), Dmitry Komornikov (59.64), Igor Marchenko (52.16), Andrey Kapralov (48.53) | 3:35.08 |
| 3 | 5 | Japan | Tomomi Morita (54.85), Kosuke Kitajima (59.19), Ryo Takayasu (52.48), Daisuke Hosokawa (48.88) | 3:35.40 |
| 4 | 7 | Germany | Steffen Driesen (55.05), Jens Kruppa (1:01.26), Thomas Rupprath (51.82), Marco di Carli (49.19) | 3:37.32 |
| 5 | 1 | France | Simon Dufour (55.91), Hugues Duboscq (59.58), Romain Barnier (53.13), Frédérick Bousquet (48.98) | 3:37.60 |
| 6 | 6 | Australia | Andrew Lauterstein (55.63), Brenton Rickard (1:00.20), Andrew Richards (53.51), Michael Klim (48.28) | 3:37.62 |
| - | 8 | New Zealand | Scott Talbot (56.12), Glenn Snyders (1:03.26), Moss Burmester (-), Cameron Gibson (-) | disqualified |
| - | 2 | Slovenia | Blaž Medvešek (55.80), Emil Tahirovič (-), Peter Mankoč (-), Jernej Godec (-) | disqualified |

### Preliminaries

| Rank | Heat+Lane | Nation | Swimmers (split) | Time | Notes |
| - | - | - | - | - | - |
| 1 | H3 L4 | United States | Randall Bal (54.16), Mark Gangloff (1:01.10), Michael Phelps (52.27), Neil Walker (48.55) | 3:36.08 | q |
| 2 | H1 L4 | Japan | Tomomi Morita (55.17), Kosuke Kitajima (59.80), Ryo Takayasu (53.10), Hisayoshi Sato (49.30) | 3:37.37 | q |
| 3 | H3 L5 | Russia | Arkady Vyatchanin (55.16), Grigory Falko (1:01.61), Evgeny Korotyshkin (52.85), Evgeny Lagunov (48.21) | 3:37.83 | q |
| 4 | H3 L3 | Australia | Andrew Lauterstein (55.01), Brenton Rickard (1:00.52), Andrew Richards (53.27), Andrew Mewing (49.43) | 3:38.23 | q |
| 5 | H1 L3 | Slovenia | Blaž Medvešek (55.36), Emil Tahirovič (1:00.94), Peter Mankoč (52.52), Jernej Godec (49.58) | 3:38.40 | q |
| 6 | H2 L4 | Germany | Steffen Driesen (55.03), Jens Kruppa (1:01.67), Thomas Rupprath (52.56), Stefan Herbst (49.27) | 3:38.53 | q |
| 7 | H2 L5 | France | Simon Dufour (56.48), Hugues Duboscq (59.95), Romain Barnier (53.71), Frédérick Bousquet (48.71) | 3:38.85 | q |
| 8 | H3 L6 | New Zealand | Scott Talbot (56.10), Glenn Snyders (1:03.09), Moss Burmester (52.94), Cameron Gibson (49.23) | 3:41.36 | q |
| 9 | H2 L3 | Canada | Keith Beavers (58.13), Mike Brown (1:01.43), Mike Mintenko (53.12), Brent Hayden (49.17) | 3:41.85 | |
| 10 | H3 L8 | Poland | Tomasz Rumianowski (56.96), Sławomir Kuczko (1:02.12), Paweł Korzeniowski (53.71), Lukasz Gasior (49.40) | 3:42.19 | |
| 11 | H1 L6 | South Korea | Seung-Hyeon Lee (58.43), Seung Hun You (1:01.96), Jeong Nam Yu (54.43), Ki Hyuk Sim (51.71) | 3:46.53 | |
| 12 | H3 L2 | Lithuania | Pavel Suskov (57.08), Vytautas Janušaitis (1:04.61), Paulius Viktoravicius (54.42), Rolandas Gimbutis (50.63) | 3:46.74 | |
| 13 | H3 L1 | Israel | Yoav Gath (57.32), Tom Be'eri (1:04.59), Erez Feren (55.09), Shai Livnat (51.20) | 3:48.20 | |
| 14 | H1 L7 | Barbados | Nick Neckles (56.33), Bradley Ally (1:04.08), Shawn Clarke (56.65), Terrence Haynes (52.55) | 3:49.61 | |
| 15 | H1 L2 | Uzbekistan | Sergey Pankov (1:00.74), Andrey Morkovin (1:05.52), Oleg Lyashko (56.63), Timur Irgashev (53.17) | 3:56.06 | |
| 16 | H2 L2 | Singapore | Gary Tan (1:00.14), Mark Tan (1:06.77), Cheng Xun Ng (56.87), Mark Chay (52.43) | 3:56.21 | |
| 17 | H2 L8 | Virgin Islands | Kieran Locke (1:00.46), Kevin Hensley (1:07.39), Scott Hensley (58.63), Josh Laban (53.46) | 3:59.94 | |
| 18 | H3 L7 | Kenya | David Dunford (1:01.85), Amar Shah (1:09.44), Rama Vyombo (1:00.29), Jason Dunford (52.51) | 4:04.09 | |
| 19 | H2 L1 | Macau | Chi Lon Lei (1:02.91), Chan Wai Ma (1:07.92), Wing Cheun Wong (56.19), Hei Meng Lao (59.43) | 4:06.45 | |
| 20 | H2 L7 | Senegal | Khlay Ciss (1:02.09), Malick Fall (1:04.08), Madicke Mbengue (1:02.70), Pape Madiop Ndong (58.55) | 4:07.42 | |
| - | H1 L5 | Ukraine | Pavlo Illichov (57.14), Oleg Lisogor (59.65), Denys Sylantyev (53.18), Yuri Yegoshin (-) | disqualified | |
| - | H1 L1 | Mongolia | not applicable | DNS | |
| - | H2 L6 | Italy | not applicable | DNS | |
